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Compact Relative Humidity & Temperature Transmitters |
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pH Transmitters With Isolated Output |
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ORP Transmitters With Isolated Output |
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Conductivity Transmitter Using 4-Ring Technology |
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Relative Humidity Transmitter |
| HI 8615 ORP TRANSMITTERS WITH ISOLATED OUTPUT | |
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| Specifications: | HI 8615 & HI 8615L | HI 8615L only |
| Range | 4 to 20 mA | 0 to ±1000 mV |
| Resolution | 0.01 mA | 1 mV |
| Accuracy | ±0.02 mA | ±5 mV |
| Calibration | Offset: ±0.8 mA Slope: ±0.8 mA | Offset: ±100 mV Slope: 90-110% |
| Input Impedance | 1012 ohm | |
| Output | 4 to 20 mA isolated | |
| Power | without LCD: 12 to 30 VDC / with LCD 15 to 36 VDC | |
| Load | Max. 500 ohms | |
| Protection | IP 65 | |
| Environment | 32 to 122°F (0 to 50°C) 0-95% RH (non-condensing) |
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| Dimensions | 6.5 x 4.3 x 3.5" (165L x 110W x 90Hmm) | |
| Weight | 2.2 lbs (1Kg) | |
| HI 8936 CONDUCTIVITY TRANSMITTERS USING 4-RING TECHNOLOGY | |
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| Specifications: | HI 8936A HI 8936AL |
HI 8936B HI 8936BL |
HI 8936C HI 8936CL |
HI 8936D HI 8936DL |
| Range | 0.0 to 199.9 mS/cm | 0.00 to 19.99 mS/cm | 0 to 1999 µS/cm | 0.0 to 199.9 µS/cm |
| Resolution (L Models Only) | 0.1 mS/cm | 0.01 mS/cm | 1 µS/cm | 0.1 µS/cm |
| Accuracy | ±2% of full scale | |||
| Calibration | 4 mA (zero) ±0.8 mA Slope: ±1.6 mA (90-110%) | |||
| Temperature Compensation |
Fixed or automatic from 32 to 122°F (0 to 50°C) with a ß of 2% | |||
| Output | 4 to 20 mA not-isolated Max. 500 ohms | |||
| Power | without LCD: 12 to 30 VDC / with LCD 15 to 36 VDC | |||
| Probe | HI 7635 or HI 7637 (not included) | |||
| Protection | IP 65 | |||
| Environment | 32 to 122°F (0 to 50°C) 0-95% RH (non-condensing) |
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| Dimensions | 6.5 x 4.3 x 3.5" (165L x 110W x 90Hmm) | |||
| Weight | 2.2 lbs (1Kg) | |||
| HI 9166, HI 9166L & HI 9168 RELATIVE HUMIDITY TRANSMITTERS | |
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| Specifications: | HI 9166 | HI 9166L | HI 9168 | |
| Range | RH | 0.0 to 100.0% RH | 0.0 to 100.0% RH | 0.0 to 100.0% RH |
| °C | — | — | -4 to 140°F (-20 to +60°C) | |
| Accuracy | RH | ±2% of Full Scale | ±2% of Full Scale | ±2% of Full Scale |
| °C | — | — | ±1°F (±0.4°C) | |
| Output (Not Isolated) | 4 to 20 mA (Max. 500 ohms) | 4 to 20 mA (Max. 500 ohms) | 4 to 20 mA for R.H. & Temp (Max. 500 ohms) | |
| Probe | HI 70604 | HI 70604 | HI 70605 | |
| Power Source | 15 to 36 VDC | |||
| Response Time | 60 seconds for 95% accuracy | |||
| Environment | from -4 to 140°F (-20 to 60°C) | |||
| Dimensions | 6.5 x 4.3 x 3.5" (165 x 110 x 90mm) | |||
| Weight | 2.2 lbs (1 Kg) | |||
| Maintenance Contract | Annual calibration contract available | |||
| HI 8614 pH TRANSMITTERS WITH ISOLATED OUTPUT | |
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| Specifications: | HI 8614 & HI 8614L | HI 8614L only |
| Range | 4 to 20 mA | 0.00 to 14.00 pH |
| Resolution | 0.01 mA | 0.01 pH |
| Accuracy | ±0.02 mA | ±0.02 pH |
| Calibration | Offset: ±2.2 mA Slope: ±0.5 mA |
Offset: ±2 pH Slope: 86-116% |
| Temperature Compensation |
Fixed or automatic from 32 to 212°F (0 to 100°C) with HI 76608 temperature probe (optional) | |
| Input Impedance | 1012 ohm | |
| Output | 4 to 20 mA isolated | |
| Power | without LCD: 12 to 30 VDC / with LCD 15 to 36 VDC | |
| Load | Max. 500 ohms | |
| Protection | IP 65 | |
| Environment | 32 to 122°F (0 to 50°C) 0-95% RH (non-condensing) |
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| Dimensions | 6.5 x 4.3 x 3.5" (165L x 110W x 90Hmm) | |
| Weight | 2.2 lbs (1Kg) | |
pH, ORP, CONDUCTIVITY & R.H. TRANSMITTERS TWO-WIRE pH & ORP TRANSMITTERS
Two-wire pH & ORP transmitters
Two-wire transmitters are widely used for process control in industry today. These instruments are particularly useful in industrial conditions where electrical interference is an important factor. By galvanically isolating the signals, any interference created is prevented from reaching the transmitter. One usually associates industrial environments with corrosive conditions, therefore any instrumentation used must be resistive to liquids and corrosion. Hanna transmitters meet all of these criteria and they only use two wires which reduces costs and eliminates the need for expensive coaxial cable. Two-wire transmitters are ideal when used in remote applications that do not have AC power available.
As technology advances it is becoming more important to monitor certain processes closely, particularly from remote locations. Computers are commonly used to receive signals from transducers that have travelled a great distance (up to 1000', [300 meters]). When transmitting signals over such a distance, it is likely that a substantial portion of the signal will be absorbed by the resistance of the lines. Considerable differences in ground potentials and between the signal source and load, are inherent to long lines.
Powering the system with an AC supply is beneficial in eliminating this problem. One of the two wires is power ground return, while the other is the power supply. The power supply line acts in a dual manner, as a power supply, and as a signal carrier. This allows the transmitter to operate with 2 wires.
The signal current from the process controller is normally 4 to 20mA. When the load is connected with the power supply return line, the signal current will be proportional in the range of 4 to 20 mA.
The ability to use a thinner gauge of wire greatly reduces the costs associated with the wiring of remote transmitters. Typically, a heavy gauge of shielded cable is required in order to minimize the ambient electrical noise from AC power sources, interference from electrical equipment or various other sources of noise.
Thin wire will also provide better operation when the transmitter current output is a 4 to 20 mA signal. All of these features and many more, give Hanna Instruments transmitters the versatility to be used over long distances in almost any process control application.
CONDUCTIVITY, 4-RING TECHNOLOGY
Hanna Instruments conductivity transmitters use top of-the-line, 4-Ring Potentiometric probes. As opposed to the more widely used 2-Ring Amperometric method, the 4-Ring Potentiometric method provides the highest accuracy and repeatability attainable. When measuring liquids that have a high conductivity, the 2-Ring system is susceptible to polarization. This condition makes it exceptionally difficult to obtain measurements with any accuracy. The polarization is directly related to the electrode's current load, and will cause a considerable, non-linear drop in the voltage. As a result, the solution around the electrode simulates a low conductivity condition.
4-Ring electrodes eliminate the polarization effect by splitting the four rings into 2 current electrodes and 2 voltage electrodes. When placed in a conductive liquid, the 2 current electrodes take the alternating voltage and create a current. This alternating current produces a Buffer Field from which polarization is absent. The voltage is then measured in this field assuring no altered readings.
Voltage electrodes carry very little current. This allows the electrodes to be arranged in a manner where the current electrodes, which are the most susceptible to polarization, are placed where they cannot effect the voltage electrodes. Consequently, the Buffer Field is large enough for the voltage electrodes to take accurate readings without being effected by polarization.
| HI 8666 COMPACT RELATIVE HUMIDITY AND TEMPERATURE TRANSMITTER | |
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| Specifications: | HI 8666 |
| Range | 0.00% (4 mA) to 100.00% RH (20 mA) -20.0°C (4 mA) to +60.0°C (20 mA) |
| Resolution | ±0.125% RH, ±0.02 mA ±0.1°C ±0.02 mA |
| Accuracy | ±2.000% RH (5% to 95% RH); ±1.0% ºC |
| Response Time | 6 seconds without sintered filter, 60 seconds with filter |
| Power Supply | 24 volts DC (supplied externally) |
| Environment | 32 to 140°F (-20 to 60°C) |
| Dimensions | 3.1 x 1.9 x 5.5" (79 x 49 x 140 mm) |
| Weight | 7 oz. (200 g) |
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HI 92240 Printing & Logging pH Meter: Recording up to 8,000 Data with Continuous Monitoring
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HI 92240 is the first portable, printing & logging pH meter available. With all of the features of the HI 9224, this meter adds to its bevy of benefits, an extensive logging function. When in logging mode, the meter stores the measurements at a user selected interval from 1 to 180 minutes. This information can be retrieved at a later date for printing or it can be transferred to a computer through infrared transmitters. The internal software allocates memory space to store up to 8,000 measurements. The battery will last for 500 hours when the meter is logging every 60 minutes. The meter can also accept the power from a 12 VDC battery charger. An optional HI 9200 transmitter can be connected to your computer's RS232 port. The HI 92240 will transfer its data in seconds through the infrared lights, no need for connecting cables between the transmitter and the meter. HI 92240 is supplied complete with an HI 1230B plastic body, gel, double junction pH electrode, an HI 7669/2 temperature probe and a rugged carrying case (PKGCASE). Upon request HI 9224D model is available. HI 9224D is supplied complete with an HI 1217D plastic, gel, combination pH electrode with built-in temperature sensor and amplifier.
Range: pH 0.00 to 14.00 pH
Temp. 0.0 to 100.0 °C
Resolution: pH 0.01 pH
Temp. 0.1°C
Accuracy: pH ±0.01 pH
Temp. ±0.5°C
Calibration: Automatic 1, 2 point with 3 memorized buffers
Temp. Compensation: Automatic from 32 to 212°F (0 to 100°C) or fixed at
25°C with temperature probe detached
Electrode: 92240 HI 1230B double-junction, pH electrode (included)
92240D HI 1217D temp. sensing/amplified electrode (included)
Temp. Probe: 92240 HI 7669/2 temperature probe (included)
Input Impedance: 10¹² ohms
Logging Interval: Selectable from 1,2,5,10,15,30,60,120 & 180 minutes
Printer: Low-power impact belt-type, 14 characters per line
Battery: 4 x 1.5 volt AA (alkaline batteries)
Battery Life: 500 hours without & 1 hour with printing/
power socket for 12 VDC supply
Environment Temp.: 32 to 122°F (0 to 50°C)
Dimensions: 8.7 x 3.2 x 2.6" (220 x 82 x 66mm)
Weight: Complete Kit: 3.1 lbs (1.4 Kg)
